Is WONDER LAKE required to publish a Consumer Confidence Report?

Yes. WONDER LAKE is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is WONDER LAKE’s next Consumer Confidence Report due?

WONDER LAKE’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

WONDER LAKE, IL · McHenry County

WONDER LAKE Water System

Consumer Confidence Report status

WONDER LAKE must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for WONDER LAKE.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Illinois’s official records. Always confirm current status with Illinois before making decisions based on this information.

System facts

System ID (PWSID): IL1115750
System type: Community Water System
Population served: 3,870
Service connections: 1,548
Ownership: local government
Water source: groundwater (wells)

WONDER LAKE is one of 248 community water systems in Illinois in the 3,301 to 10,000 people size category, serving 3,870 people from groundwater.

As of August 1, 2026, its federal record holds 57 entries between 1977 and 2025, all of which EPA lists as closed.

Of the 57, 52 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves volatile organic chemicals, the Total Coliform Rules, and the Lead and Copper Rule.

Violation history

Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2025 – November 18, 2025
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
April 1, 2025 – August 27, 2025
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
February 10, 2024 – April 8, 2024
Resolved
OCCT/SOWT Study/Recommendation
Health-based
Lead and Copper Rule
April 2, 2023 – June 22, 2023
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2022 – December 31, 2022
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
March 12, 2005 – July 28, 2005
Resolved
Public Notification Violation without NPDWR Violation
—
Public Notice
March 12, 2005 – July 28, 2005
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
January 1, 2004 – January 31, 2004
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2002 – May 31, 2002
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
January 1, 2001 – January 31, 2001
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
July 1, 1998 – July 31, 1998
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
July 1, 1995 – July 31, 1995
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 1993 – May 31, 1993
Archived
Monitoring, Regular
—
Styrene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
cis-1,2-Dichloroethylene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
Ethylbenzene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
Toluene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
Benzene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
Trichloroethylene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
1,2-Dichloropropane
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
1,2-Dichloroethane
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
o-Dichlorobenzene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
Benzene
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
Xylenes, Total
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
Carbon tetrachloride
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
Tetrachloroethylene
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
CHLOROBENZENE
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
Styrene
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
Trichloroethylene
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
Tetrachloroethylene
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
Styrene
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
Benzene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
CHLOROBENZENE
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Tetrachloroethylene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Trichloroethylene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
1,2-Dichloropropane
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Carbon tetrachloride
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
1,2-Dichloroethane
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
p-Dichlorobenzene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
o-Dichlorobenzene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
cis-1,2-Dichloroethylene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Ethylbenzene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Toluene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Styrene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Xylenes, Total
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 30, 1977 – June 29, 1981
Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2025 – November 18, 2025	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
April 1, 2025 – August 27, 2025	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
February 10, 2024 – April 8, 2024	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
April 2, 2023 – June 22, 2023	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Health-based	Resolved
January 1, 2022 – December 31, 2022	Monitoring, Regular	Nitrate	—	Resolved
March 12, 2005 – July 28, 2005	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
March 12, 2005 – July 28, 2005	Public Notification Violation without NPDWR Violation	Public Notice	—	Resolved
January 1, 2004 – January 31, 2004	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
May 1, 2002 – May 31, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
January 1, 2001 – January 31, 2001	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
July 1, 1998 – July 31, 1998	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
July 1, 1995 – July 31, 1995	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
May 1, 1993 – May 31, 1993	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	Styrene	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	Ethylbenzene	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	Toluene	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	Benzene	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	Trichloroethylene	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	1,2-Dichloropropane	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	1,2-Dichloroethane	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	o-Dichlorobenzene	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	Benzene	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	Xylenes, Total	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	o-Dichlorobenzene	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	1,2-Dichloroethane	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	Carbon tetrachloride	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	Tetrachloroethylene	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	CHLOROBENZENE	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	Styrene	—	Archived
October 1, 1992 – December 31, 1992	Monitoring, Regular	Trichloroethylene	—	Archived
October 1, 1992 – December 31, 1992	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
October 1, 1992 – December 31, 1992	Monitoring, Regular	Tetrachloroethylene	—	Archived
October 1, 1992 – December 31, 1992	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
October 1, 1992 – December 31, 1992	Monitoring, Regular	Styrene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Benzene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	CHLOROBENZENE	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Tetrachloroethylene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Trichloroethylene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	1,2-Dichloropropane	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Carbon tetrachloride	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	1,2-Dichloroethane	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	p-Dichlorobenzene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	o-Dichlorobenzene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Ethylbenzene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Toluene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Styrene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Xylenes, Total	—	Archived
June 30, 1977 – June 29, 1981	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

November 18, 2025State Compliance achieved1 linked violation
August 27, 2025State Compliance achieved1 linked violation
July 29, 2025State Public Notification requested1 linked violation
July 29, 2025State Violation/Reminder Notice1 linked violation
July 16, 2025State Violation/Reminder Notice1 linked violation
April 15, 2024State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 8, 2024State Compliance achieved1 linked violation
March 15, 2024State Violation/Reminder Notice1 linked violation
February 14, 2024State Compliance achievedgeneral compliance action — not tied to a specific violation on record
September 19, 2023State Compliance achieved1 linked violation
June 22, 2023State Compliance achieved1 linked violation
April 17, 2023State Violation/Reminder Notice1 linked violation
April 17, 2023State Public Notification requested1 linked violation
March 27, 2023State Public Notification received1 linked violation
February 9, 2023State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
February 9, 2023State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
February 6, 2023State Public Notification requested1 linked violation
February 6, 2023State Violation/Reminder Notice1 linked violation
September 30, 2005State Compliance achieved1 linked violation
August 5, 2005State Bilateral Compliance Agreement signed3 linked violations
July 28, 2005State Compliance achieved2 linked violations
July 28, 2005State Public Notification received2 linked violations
July 26, 2005State Formal Notice of Violation issued3 linked violations
February 7, 2005State Violation/Reminder Notice1 linked violation
September 29, 2004State Compliance achieved2 linked violations
May 16, 2003State Public Notification received1 linked violation
March 15, 2001State Public Notification requested3 linked violations
September 15, 1998State Public Notification requested1 linked violation
September 15, 1998State Violation/Reminder Notice1 linked violation
October 19, 1993State Compliance achieved3 linked violations
October 19, 1993State Compliance achieved68 linked violations
October 19, 1993State Compliance achieved5 linked violations
October 19, 1993State Compliance achieved3 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved3 linked violations
October 19, 1993State Compliance achieved3 linked violations
October 19, 1993State Compliance achieved3 linked violations
October 19, 1993State Compliance achieved5 linked violations
July 10, 1993State Public Notification requested1 linked violation
July 10, 1993State Violation/Reminder Notice1 linked violation
July 7, 1993State Violation/Reminder Notice17 linked violations
July 7, 1993State Public Notification requested17 linked violations
April 20, 1993State Public Notification requested17 linked violations
April 20, 1993State Violation/Reminder Notice17 linked violations
January 19, 1993State Violation/Reminder Notice17 linked violations
January 19, 1993State Public Notification requested17 linked violations
July 1, 1992State Public Notification requested17 linked violations
July 1, 1992State Violation/Reminder Notice17 linked violations
January 11, 1992State Public Notification requested1 linked violation
March 16, 1990State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
January 13, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
January 13, 1990State Violation/Reminder Notice1 linked violation

Common questions

Is WONDER LAKE required to publish a Consumer Confidence Report?: Yes. WONDER LAKE is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is WONDER LAKE’s next Consumer Confidence Report due?: WONDER LAKE’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does WONDER LAKE have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for WONDER LAKE.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

MANGUM, JAMES

815-277-9589

WONDER LAKE, IL 60097